Diodes Incorporated DESD1P0RFWQ-7

Overview

DESD1P0RFWQ-7 from Diodes Incorporated is an automotive-grade, low-capacitance ESD protection diode array in SOT323 package, rated for ±30 kV contact/air discharge (IEC 61000-4-2), 70 V reverse working voltage, 1.5 pF capacitance at 0 V/1 MHz, and 15 A peak pulse current (8/20 µs). It protects high-speed data lines such as USB 2.0, HDMI, and LVDS interfaces in infotainment and ADAS modules.

For engineers reviewing the DESD1P0RFWQ-7 datasheet, DESD1P0RFWQ-7 pinout, DESD1P0RFWQ-7 application, or DESD1P0RFWQ-7 equivalent, key selection factors include clamping voltage at 3A/10A, junction-to-ambient thermal resistance (625 °C/W), AEC-Q101 qualification status, and rail-to-rail anti-parallel configuration suitability for bidirectional signal line protection.

Technical Context

This dual-diode array uses a common-cathode anti-parallel configuration to provide bidirectional ESD suppression on a single signal line. Its low 1.5 pF total capacitance minimizes signal integrity impact on data rates up to 480 Mbps (USB 2.0 compliant), while the 6 V typical forward clamping voltage at 3 A ensures robust transient voltage limiting without compromising interface timing margins.

The device operates across –65 °C to +150 °C and is qualified per AEC-Q101 Rev. D for automotive underhood and cabin applications. Thermal derating follows a linear curve from 200 mW at 25 °C to zero at 150 °C, requiring PCB pad layout per FR-4 minimum recommendations to maintain R_θJA = 625 °C/W.

Key Specifications

Pinout & Package

Package: SOT323 - surface-mount, 3-terminal plastic case with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.006 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ESD protection applications.

Compared with ESD5Z7.0T5G and TPD2EUSB30DRYR, DESD1P0RFWQ-7 uniquely combines AEC-Q101 qualification, integrated anti-parallel architecture, and 70 V standoff in a 3-pin SOT323-making it optimal for cost-sensitive, space-constrained automotive USB 2.0 and LVDS protection where reliability and simplicity are prioritized over ultra-low capacitance or multi-channel integration.

Availability

DESD1P0RFWQ-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with guaranteed AEC-Q101 compliance and long-term production continuity.

Supply support for DESD1P0RFWQ-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

This device belongs to Diodes' Automotive ESD Protection portfolio, engineered specifically to meet stringent AEC-Q101 stress-test requirements while delivering low capacitance and fast response for high-speed serial interfaces in vehicles.

FAQ

What is the difference between DESD1P0RFW-7 and DESD1P0RFWQ-7?

DESD1P0RFWQ-7 is the automotive-qualified version, fully tested and certified to AEC-Q101 Rev. D standards-including temperature cycling, high-temperature reverse bias, and ESD robustness. DESD1P0RFW-7 is the commercial-grade variant without automotive qualification testing or traceability documentation, intended for non-automotive applications.

Can DESD1P0RFWQ-7 protect bidirectional data lines like USB D+ and D−?

Yes - its internal anti-parallel dual-diode configuration provides symmetrical clamping for both positive and negative ESD transients on a single line. One device protects one signal line (e.g., D+), and a second protects D−; no external bias or polarity selection is needed.

Is the 1.5 pF capacitance measured per diode or total?

The 1.5 pF value is total capacitance measured line-to-ground with both diodes in parallel under 0 V bias at 1 MHz, as confirmed in the datasheet's Electrical Characteristics table (Note 8). This represents the actual loading seen by the protected signal path.

Does DESD1P0RFWQ-7 require a ground connection to function?

Yes - Pin 2 (common cathode) must be connected to a low-inductance ground plane to complete the ESD current path. Without this reference, clamping cannot occur. The device does not require V_CC connection; ground-only operation enables use in floating or battery-powered subsystems.